Hair Help Question

I have a 13 year old son who plays in a private club (which I won't name!!!). He has longish but not super long hair (not quite shoulder length at the back) and doesn't want to cut it. A new Club Secretary recently came in and has been putting all these new little rules in place and one of them relates to dress code. My son used to wear a hat to keep his hair out of his eyes, but now this is not going to be allowed during competitions, nor a bandanna. The bangs/front are not long enough to just tie back into a low ponytail so I am stumped as to what to suggest for him other than going for a French braid (which I don't think he would appreciate). I've tried arguing the ridiculousness of the new rule but was reminded that it was a private club and members had voted on it to get certain standards into place (I suspect the fuddy duddies don't like long hair boys).

Any thoughts (I only keep him there because they really have an excellent instructor)